Word: hydrogens
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...greater thrust than those of the first orbiter, Columbia, when the throttle is fully opened. Realizing that this extra power would vibrate the spacecraft more violently, NASA engineers at the Marshall Space Flight Center made a design change. They ordered reinforcement of the metal piping that carries hot, gaseous hydrogen fuel into the small chamber where the engines are first fired up and begin revving to their full 480,000 lbs. of thrust...
...said that discovery of the defect was a tribute to the space agency's quest for safety. He might have added that it was also because of an odd bit of luck. In late January, only days before Challenger's originally scheduled liftoff, NASA inspectors discovered that hydrogen was leaking from the No. 1 engine...
...infrared telescope, NASA last week was confronted by new difficulties with the troubled space shuttle Challenger. Standing forlornly on its Florida pad since Nov. 30, the gleaming $1 billion orbiter will probably not be launched before mid-March at the earliest, two months late. Reason: a hazardous hydrogen leak required the removal last week of one of Challenger's three main rocket engines, a task never before attempted while a shuttle was still...
Using special sensors that can "sniff" the chemical signature of a gas, technicians traced the leak to a ¾-in.-long crack in the hot-gas manifold, where hydrogen and oxygen are gathered under high pressure (4,400 Ibs. per sq. in.) before combustion. Undiscovered, the leak might have caused an explosion. This week technicians hope to install a new engine, trucked from the National Space Technology Laboratories in Bay St. Louis, Miss...
...floor, helping to rid local beaches of a thick, gooey carpet of tar that washes up daily. Says County Supervisor William Wallace: "If your dog got loose and went down to the beach, it would take you an hour to clean his feet." Still worse, the putrid smell of hydrogen sulfide often hangs over the area like vapor from a truckload of rotten eggs. The culprit is not a leaking oil well, but nature. The ocean floor is spilling large quantities of oil and natural gas through fissures that geoloists call seeps. Says Petroleum Geologist Robert Gaal of the California...